I posted this in the "Am I Infected" forum but realized I probably posted in in the wrong place and moved it here. Sorry for my mistake!
Here is the problem (copied and pasted from my wrong-forum thread):
I thought I was pretty proficient at computer stuff and tried to tackle a problem myself last year. Now I am learning that I might not have actually taken care of the problem and I am paranoid.
Last year I had some malware problems that I thought I completely solved by scanning and healing with AVG and Malware Bites (then scanning again in safe mode with the AVG USB -- didn't find any potential errors when I did it and I followed the instructions to the letter).
However, the other day, my boss asked me to help her with some of her computer issues and in doing so read a lot of stuff that wigged me out about whether or not I had actually solved my problem from last year. I got a bit paranoid in making sure I didn't have something leeching information off my machine. I had an email address that was among those leaked in that huge security issue early this year and while I have changed all my passwords, enabled 2 step authentication, etc etc etc, I just want to make sure that doesn't happen again.
I read some threads on this forum and used several of the scanners suggested here - basically, all the ones it turns out I shouldn't have used (the heavy duty ones). However, every single one but Roguekiller found nothing wrong, to my relief. With Roguekiller, I investigated and "cleaned" something that came up and thought oh, this is probably all the bad stuff I have to deal with. However, there are several gray PUMs listed. I know these can be potentially bad things, or not, and I'm not really sure how to investigate them further. I should have been more cautious when reading the instructions listed originally, but after reading this forum, I decided not to delete or do anything to them, as I know now that this could wreak havoc on my machine. I'm sorry. I thought I was proficient enough to handle this problem but it turns out that I am definitely not.
As far as symptoms, my computer takes a weirdly long time to start up -- longer than the "30 second guarantee startup" that came with it's purchase. However, it doesn't seem to take an especially long time? I am not sure. Today I got the first runtime error I've experienced on this machine - mongoose.cl. Anyway, I can copy and paste this on the Malware section if needed, I just figured it would be more appropriate here, as I am not sure whether or not these are infections in the first place.
Thank you so much.
Edit: I can't believe I forgot this - I have Windows 7 on this machine