Nasty symptoms started today on my Win 7 box and have me a little stumped re what I should do. This is Win7 64-bit. I have MS Security Essentials installed and up-to-date.
MSE reports that it detected 2 malware today: Ransom:Win32/Crowti.A and Trojan:Win32/Neurevt.B It reports that both were quarantined because "could not find the malware".
However, whenever I reboot I get a flurry of errors of various kinds - programs set to run on startup that are failing to run, Windows Explorer crashing, etc. Stuff all kinds of messed up. And then every time MSE pops up again saying it detected the Crowti.A, and quarantined it. Same result as before. But every time I reboot, it's back.
I tried booting into safe mode and running a full scan w/ MSE but it didn't find anything at all. But it's back as soon as I do a standard reboot.
Meanwhile, the main symptom seems to be a heinous memory leak. I have 8GB of RAM, and something claims more and more of it until it's all in use. Closing programs only helps momentarily. My disks constantly thrash (assuming due to constant swapping.) None of this happens in safe mode.
What should I try next, if the malware is still there but MSE can't find it in safe mode?