system
3
Crypto:
check the file with Onlinescanners from Trend and KAV (see below; pause avast’s resident shield first; be sure to reenable it afterwards…) → to confirm infection/rule out false alarm, as crypto is not supposed to be wildly spread… maybe you’re lucky…
and best DON’T reboot the PC, if you have not already done so since avast alerted you to the crypto virus 