проверьте может ли эта Windows 8.1 подключиться ещё к какому-нибудь компьютеру.
Не может
Антивирус на Windows 8.1 работает?
Да
Попробуйте на Windows 8.1 прогнать тест sfc /scannow
Самые последние записи, где говорится о каких либо повреждениях:
2021-10-27 19:22:40, Info CSI 00000a64 [SR] Cannot repair member file [l:36{18}]"Amd64\CNBJ2530.DPB" of prncacla.inf, Version = 6.3.9600.17415, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type = [l:24{12}]"driverUpdate", TypeName neutral, PublicKey neutral in the store, hash mismatch
2021-10-27 19:22:41, Info CSI 00000a66 [SR] Cannot repair member file [l:36{18}]"Amd64\CNBJ2530.DPB" of prncacla.inf, Version = 6.3.9600.17415, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type = [l:24{12}]"driverUpdate", TypeName neutral, PublicKey neutral in the store, hash mismatch
2021-10-27 19:22:41, Info CSI 00000a67 [SR] This component was referenced by [l:166{83}]"Package_2709_for_KB3000850~31bf3856ad364e35~amd64~~6.3.1.8.3000850-6825_neutral_GDR"
2021-10-27 19:22:41, Info CSI 00000a68 [SR] Repair complete
2021-10-27 19:22:41, Info CSI 00000a69 [SR] Committing transaction
2021-10-27 19:22:41, Info CSI 00000a6e [SR] Verify and Repair Transaction completed. All files and registry keys listed in this transaction have been successfully repaired
Попробую восстановление DISM'ом