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更新日: 2018/12/11
FAQ番号: 035051

ウイルスやスパイウェア(マルウェア)に感染してしまった場合の対処方法(Windows 8 / Windows 8.1 / Windows 10)

以下のような現象が発生した場合、ウイルスやスパイウェア (マルウェア)に感染してしまった可能性があります。セキュリティーソフトやスパイウェア対策ソフトを使用し、ウイルスやスパイウェア (マルウェア)が発見された場合は駆除する必要があります。

感染してしまったときの現象

以下に記載している例はウイルス、スパイウェア (マルウェア)に感染した場合の一般的な現象の一部です。

ネットワークに接続していないのにポップアップ広告が表示される
強制的に意図しないWebページが表示される
急にパソコンのパフォーマンスが低下する
パソコンが勝手に再起動してしまう
個人情報が勝手に送信される

対処方法

お使いのセキュリティーソフト、スパイウェア対策ソフトの定義ファイルを最新にして、ハードディスク全体をスキャンしてください。

Windowsには、ウイルス対策やスパイウェア (マルウェア)対策として「Windows セキュリティ (Windows Defender)」が標準搭載されています。セキュリティーソフトを使用していない場合には、「Windows セキュリティ (Windows Defender)」の定義ファイルを最新にして、ハードディスク全体をスキャンしてください。
定義ファイルを最新にする方法、ハードディスク全体をスキャンする方法など詳細については下記コンテンツをご覧ください。

Windows Defenderの使用方法(Windows 8 / Windows 8.1)

ウイルス対策をする： Windows セキュリティ (Windows 10)

マルウェアとは、ウイルス (ワーム、トロイの木馬など)のようなパソコンに故意に問題を引き起こすように設計された悪意のあるソフトウェアのことです。

このページの先頭へ

このFAQを参照した人は以下のFAQも参照しています

問題が解決しないときは

機種	ATX-7000, ATX-7001, CREASENSE 3000, CREASENSE 3500, CREASENSE 5000, CREASENSE 5000A, CREASENSE Pro, ET-6000, ET-6500, ET-6800, ET-8000, JM8200, JM8300, JM8400, LX2500, LX7500, LX7700, LX7800, LX7900, LX9000, MR6000, MR6500, MR6500E, MR6700, MR6700E, MR6900, MR6900E, MR7000E, MR7200E-L, MR7200-M, MR7300E-L, MR7300-M, MR7400E, MR7400, MR8000, MR8000E-L, MR8100, MR8100E, MR8200, MR8200E, MR8300, MR8300-R, MR8400, MT-3000, MT-3000A, MT-3500, MT-4000, MT-4500, MT-6000, MT6100, MT7000, MT7300, MT7500, MT7700, MT7800, MT7900, MT8000, MT8800, MT9000, Pro-1000, Pro1100, Pro-200, Pro2000, Pro-200E, Pro2500, Pro-300, Pro3000, Pro3100, Pro-330, Pro3300, Pro3500, Pro-400, Pro4000, Pro4300, Pro4350, Pro4500, Pro-500L, Pro-600L, Pro-620L, Pro-650L, Pro-700L, Pro-720L, Pro-800L, Pro-900, Pro4700, Pro5000, Pro5300, Pro5500-H, Pro5500-M, Pro5700, Pro5800, Pro5900, Pro7000, Pro7500, Pro8000-H, Pro8000-M, Pro5600-H, Pro5600-M, Pro8100-H, Pro8100-M, Pro9000, Pro9050a, Pro9100, RC-330 Model DV, RC-330 Model PV, RC-330 Model RX, RC-400 Model DV, RC-400 Model PV, RC-400 Model RX, RC-500 Model RX, SV1000, TC500L, TC500M, TC515L, TC515M, TC535LN, TC535LR, TC535LRN, TC535MN, TC535MR, TC535MRN, TC720, TC730, TC840, TC940, TP1030AV, TP1040AV, TP1040RV, TP515LR, TP515MR, TP715LR, TP715LRN, TP715MR, TP715MRN, TP820R, TP830AV, TP863R, TY5000S, TY5100S, VZ-3000, VZ-4000, VZ-5000, VZ-6000, BN100, ES10, F530H, F530P, F550H, F550P, F730, F735, F750, F755, L330H, L330P, L330T, L350H, L350P, L350T, NC610, NC710, NC710R, NC715, NC715DR, NC715R, NC820, NC820DR, NC820R, NC821, NC821DR, NC821R, R230H, R230P, R250H, R250P, R330H, R330P, R350H, R350P, R365H, R365P, R385H, R385P, R430H, R430P, R450H, R450P, R530H, R530P, R550H, R550P, R730H, R730P, R750H, R750P, R755H, R755P, R765H, R765P, R830H, R830P, R850H, R850P, R855H, R855P, R865H, R865P, R885H, R885P, S150H, S150P, S150T, S160H, S160P, S160T, S270H, S270P, S270T, JE91, JE94, JE3900, JN520, JN521, JN521-2, JN4100, JN4300, JN4300-2, JN7000, JN7500, JL1000, JT22, JT40, JT50, LX1000, NA101, NA102, NA103, NA104, NA501E, NA601E, NA511E, NA512E, NA513E, NA513E-V, NA520E, NA521E, NA521E-2, NA701, NA702, NA710E, NA801, NA802, Na01mini_Na01mini-H, Na02mini-V_Na02mini, Na03mini, Na04mini, Na14S, NJ1000, NJ2000, NJ2050, NJ2100, NJ3000, NJ5000Pro, NJ5100Pro, NJ5200Pro, NJ2150, NJ3100, NJ3100E, NJ3300, NJ3300E, NJ3350E, NJ3500E, NJ3700E, NJ3900E, NJ4000E, NJ4100E, NJ4100E-AC, NJ4100E-V, NJ4300, NJ4300E, NJ4300E-AC, NJ4400E, NJ4400E-2, NJ5500E, NJ5700E, NJ5900E, NJ5950E, NJ5970E, NJ6000E, NJ6100E, NJ7000E, NJ7500E, NL1000E, NT-100, NT-1000, NT-1200, NT-1400, NT2000, NT2500, NT2600, NT2700, NT2800, NT2850, NT300, NT3000, NT330, NT331, NT340, NT350, NT-500, NT-5000, NT550, NT-600, NT6000, NT-700, NT7000Pro, NT7100Pro, NT7200Pro, NT-800, NT9000Pro, NT9500Pro, TB01S-B, TB01S, TB20S-B, TK-100, TK-300, TK-400, TN10E, TN20E, TN21E, TN22, TN30E, TN40, CM2150, F52A, NY10S, NY2000, NY2100S, NY2200S, NY2300S, NY2400S, NY2400S-Y, NY2400S-Z, NY3000, NY3200S, NY3300S, NY40S, NY40S-B, NY2500S-Y, NY2500S-Z, AT10, AT10-AC, AT10-V, AT-1000, AT-1500, AT20, AT200, AT205, AT-3000, AT-3050, AT-3500, AT-3550, AT-3600, AT-400C, AT-500, AT-5000, AT-500L, AT-5500, AT-550L, AT-550LK, AT-6000, AT-600C, AT-6500, AT-650C, AT-6800, AT-680C, AT-6900, AT-690C, AT-700C, AT-8000, AT-800C, AT-900C, AT920C, AT930C, AT950, AT951, AT955, AT960, AT970, AT971, AT971E, AT980E, AT990E, AT995E, AT991E, AT992E, AT993E, AT994E, AT997, AT997E, AT997-2, AT997E-2, AY300-V_AY300, AY301-V_AY301, AY311S, AY320S, AY321S, AY330S, AY331S, BB100, CM3100, CM970, JA994, JA997, JE10, JE110, JE170, JE180, JE20, JE4500, JE93, JE992, JE993, JG100, JM4800, JM4900, JM5000, JS40, JS50, JS190, JS200, CREASENSE, CREASENSE PS, CREASENSE XS, FX615D, FX615R, FX720, FX720D, FX720R, MR1000, MR1050, MR1300, MR1350, MR1500, MR1550, MR2000, MR2100, MR3000, MR3100, MR3300, MR3500, MR4000, MR4100, MR4300E, MR4400E, MR4500E, MR4600E, MR4700E, MR4800E, MR4900, MR5000, MV1100H, MV1100P, MV1300H, MV1300P, MV1500H, MV1500P, MW1000H, MW1000P, MW2300H, MW2300P, MW2500H, MW2500P, MW3000H, MW3000P, MW3300H, MW3300P, MW3500H, MW3500P, MX1300H, MX1300P, MX1500H, MX1500P, MX1600HTV, MX1600PTV, MX1700HTV, MX1700PTV, MX1800HTV, MX1800PTV, MX2500HTV, MX2500PTV, MX2700HTV, MX2700PTV, MX3500HVR, MX3500PVR, MX3550HVR, MX3550PVR, MX3700HVR, MX3700PVR, MX3850HVR, MX3850PVR, NB50E, NB51E, NP11-V_NP11, NP12-V_NP12, NP15, NP25S, NP30S, NP31S, Pro-100L, PT-2000, PT-2100, PT-2200, PT-3000, PT4000, PT4300, PT5000, PT100E, PT110E, PU100S, SG100E, ST10E, ST11E, ST20E, ST40E, ST50, ST50E, ST100, ST110, ST120, ST120E, ST125E, ST150E, ST160E, ST170E, ST180E, ST190E, ST190, ST200E, SY01, SV110h, SV120h, TD160E, TY1100S, VT-2000, VT-75
OS	Windows 10 Home 64bit, Windows 10 Pro 64bit, Windows 10 Home 32bit, Windows 10 IoT Enterprise, Windows 8.1 64bit, Windows 8.1 Pro 64bit, Windows 8.1 32bit, Windows 8.1 Embedded 8.1 Industry Pro 64bit, Windows 8 64bit, Windows 8 Pro 64bit, Windows 8 32bit, Windows 8 Pro 32bit

機種

ATX-7000, ATX-7001, CREASENSE 3000, CREASENSE 3500, CREASENSE 5000, CREASENSE 5000A, CREASENSE Pro, ET-6000, ET-6500, ET-6800, ET-8000, JM8200, JM8300, JM8400, LX2500, LX7500, LX7700, LX7800, LX7900, LX9000, MR6000, MR6500, MR6500E, MR6700, MR6700E, MR6900, MR6900E, MR7000E, MR7200E-L, MR7200-M, MR7300E-L, MR7300-M, MR7400E, MR7400, MR8000, MR8000E-L, MR8100, MR8100E, MR8200, MR8200E, MR8300, MR8300-R, MR8400, MT-3000, MT-3000A, MT-3500, MT-4000, MT-4500, MT-6000, MT6100, MT7000, MT7300, MT7500, MT7700, MT7800, MT7900, MT8000, MT8800, MT9000, Pro-1000, Pro1100, Pro-200, Pro2000, Pro-200E, Pro2500, Pro-300, Pro3000, Pro3100, Pro-330, Pro3300, Pro3500, Pro-400, Pro4000, Pro4300, Pro4350, Pro4500, Pro-500L, Pro-600L, Pro-620L, Pro-650L, Pro-700L, Pro-720L, Pro-800L, Pro-900, Pro4700, Pro5000, Pro5300, Pro5500-H, Pro5500-M, Pro5700, Pro5800, Pro5900, Pro7000, Pro7500, Pro8000-H, Pro8000-M, Pro5600-H, Pro5600-M, Pro8100-H, Pro8100-M, Pro9000, Pro9050a, Pro9100, RC-330 Model DV, RC-330 Model PV, RC-330 Model RX, RC-400 Model DV, RC-400 Model PV, RC-400 Model RX, RC-500 Model RX, SV1000, TC500L, TC500M, TC515L, TC515M, TC535LN, TC535LR, TC535LRN, TC535MN, TC535MR, TC535MRN, TC720, TC730, TC840, TC940, TP1030AV, TP1040AV, TP1040RV, TP515LR, TP515MR, TP715LR, TP715LRN, TP715MR, TP715MRN, TP820R, TP830AV, TP863R, TY5000S, TY5100S, VZ-3000, VZ-4000, VZ-5000, VZ-6000, BN100, ES10, F530H, F530P, F550H, F550P, F730, F735, F750, F755, L330H, L330P, L330T, L350H, L350P, L350T, NC610, NC710, NC710R, NC715, NC715DR, NC715R, NC820, NC820DR, NC820R, NC821, NC821DR, NC821R, R230H, R230P, R250H, R250P, R330H, R330P, R350H, R350P, R365H, R365P, R385H, R385P, R430H, R430P, R450H, R450P, R530H, R530P, R550H, R550P, R730H, R730P, R750H, R750P, R755H, R755P, R765H, R765P, R830H, R830P, R850H, R850P, R855H, R855P, R865H, R865P, R885H, R885P, S150H, S150P, S150T, S160H, S160P, S160T, S270H, S270P, S270T, JE91, JE94, JE3900, JN520, JN521, JN521-2, JN4100, JN4300, JN4300-2, JN7000, JN7500, JL1000, JT22, JT40, JT50, LX1000, NA101, NA102, NA103, NA104, NA501E, NA601E, NA511E, NA512E, NA513E, NA513E-V, NA520E, NA521E, NA521E-2, NA701, NA702, NA710E, NA801, NA802, Na01mini_Na01mini-H, Na02mini-V_Na02mini, Na03mini, Na04mini, Na14S, NJ1000, NJ2000, NJ2050, NJ2100, NJ3000, NJ5000Pro, NJ5100Pro, NJ5200Pro, NJ2150, NJ3100, NJ3100E, NJ3300, NJ3300E, NJ3350E, NJ3500E, NJ3700E, NJ3900E, NJ4000E, NJ4100E, NJ4100E-AC, NJ4100E-V, NJ4300, NJ4300E, NJ4300E-AC, NJ4400E, NJ4400E-2, NJ5500E, NJ5700E, NJ5900E, NJ5950E, NJ5970E, NJ6000E, NJ6100E, NJ7000E, NJ7500E, NL1000E, NT-100, NT-1000, NT-1200, NT-1400, NT2000, NT2500, NT2600, NT2700, NT2800, NT2850, NT300, NT3000, NT330, NT331, NT340, NT350, NT-500, NT-5000, NT550, NT-600, NT6000, NT-700, NT7000Pro, NT7100Pro, NT7200Pro, NT-800, NT9000Pro, NT9500Pro, TB01S-B, TB01S, TB20S-B, TK-100, TK-300, TK-400, TN10E, TN20E, TN21E, TN22, TN30E, TN40, CM2150, F52A, NY10S, NY2000, NY2100S, NY2200S, NY2300S, NY2400S, NY2400S-Y, NY2400S-Z, NY3000, NY3200S, NY3300S, NY40S, NY40S-B, NY2500S-Y, NY2500S-Z, AT10, AT10-AC, AT10-V, AT-1000, AT-1500, AT20, AT200, AT205, AT-3000, AT-3050, AT-3500, AT-3550, AT-3600, AT-400C, AT-500, AT-5000, AT-500L, AT-5500, AT-550L, AT-550LK, AT-6000, AT-600C, AT-6500, AT-650C, AT-6800, AT-680C, AT-6900, AT-690C, AT-700C, AT-8000, AT-800C, AT-900C, AT920C, AT930C, AT950, AT951, AT955, AT960, AT970, AT971, AT971E, AT980E, AT990E, AT995E, AT991E, AT992E, AT993E, AT994E, AT997, AT997E, AT997-2, AT997E-2, AY300-V_AY300, AY301-V_AY301, AY311S, AY320S, AY321S, AY330S, AY331S, BB100, CM3100, CM970, JA994, JA997, JE10, JE110, JE170, JE180, JE20, JE4500, JE93, JE992, JE993, JG100, JM4800, JM4900, JM5000, JS40, JS50, JS190, JS200, CREASENSE, CREASENSE PS, CREASENSE XS, FX615D, FX615R, FX720, FX720D, FX720R, MR1000, MR1050, MR1300, MR1350, MR1500, MR1550, MR2000, MR2100, MR3000, MR3100, MR3300, MR3500, MR4000, MR4100, MR4300E, MR4400E, MR4500E, MR4600E, MR4700E, MR4800E, MR4900, MR5000, MV1100H, MV1100P, MV1300H, MV1300P, MV1500H, MV1500P, MW1000H, MW1000P, MW2300H, MW2300P, MW2500H, MW2500P, MW3000H, MW3000P, MW3300H, MW3300P, MW3500H, MW3500P, MX1300H, MX1300P, MX1500H, MX1500P, MX1600HTV, MX1600PTV, MX1700HTV, MX1700PTV, MX1800HTV, MX1800PTV, MX2500HTV, MX2500PTV, MX2700HTV, MX2700PTV, MX3500HVR, MX3500PVR, MX3550HVR, MX3550PVR, MX3700HVR, MX3700PVR, MX3850HVR, MX3850PVR, NB50E, NB51E, NP11-V_NP11, NP12-V_NP12, NP15, NP25S, NP30S, NP31S, Pro-100L, PT-2000, PT-2100, PT-2200, PT-3000, PT4000, PT4300, PT5000, PT100E, PT110E, PU100S, SG100E, ST10E, ST11E, ST20E, ST40E, ST50, ST50E, ST100, ST110, ST120, ST120E, ST125E, ST150E, ST160E, ST170E, ST180E, ST190E, ST190, ST200E, SY01, SV110h, SV120h, TD160E, TY1100S, VT-2000, VT-75

Windows 10 Home 64bit, Windows 10 Pro 64bit, Windows 10 Home 32bit, Windows 10 IoT Enterprise, Windows 8.1 64bit, Windows 8.1 Pro 64bit, Windows 8.1 32bit, Windows 8.1 Embedded 8.1 Industry Pro 64bit, Windows 8 64bit, Windows 8 Pro 64bit, Windows 8 32bit, Windows 8 Pro 32bit