I recently did a fresh install of Windows 7 on my PC. I guess I forgot to install any AV until I was prompted to by Windows Update, which if I remember correctly, did install OK originally. Normally I would have installed AVG and MB, but I've had quite a few PC problems recently and so was a little haphazard, I can't remember whether I actually got MB installed prior to these problems or after. Anyhow, recently I started up my PC and upon starting got a message that MSE couldn't start because of error occurring during initialization, Error 0x80073b01.
I found a similar topic here and have run a few of the programs, most optimistically Hitman Pro, which found a couple trojans and malware items and deleted them. But I still have this issue with MSE that it can't load, can't be reinstalled and can't be uninstalled.
Other symptoms: Malware Bytes icon on my desktop went from being their logo to a generic .lnk/shortcut image and wouldn't load. I managed to reinstall it after using safe mode and using mbam clean to get rid of the mbamext.dll that wouldn't delete normally. I now have MBAM on my desktop and I can run it, but it won't get the latest updates (it appears to download them, but then says the db is missing or corrupt) and it won't let me do a scan.
I have been trying to copy some files to an external HD, but the ones with Security in their name can't be moved.
It seems like something is definitely running in the background controlling certain attempted actions.
Thanks for any help.