I'd been getting a lot of popups, etc. lately but my computer started acting really out of the ordinary today with the same popups over and over and it going so slow I could hardly open any programs. I found out that the problem may have been wintools, I don't even know what that is but I got instructions on how to remove it. Problem is, I had to restart first and ever since then I haven't been able to login to windows xp at all. I get as far as the screen where you have to choose which user, and I get an error # 0x80090019 ... then it acts as if it will still let me login, but I can't. Every time I click on my name to login in brings me back to the blue screen and eventually its totally blue with nothing left. So I have no idea what's wrong with that.
I've tried booting up in safe mode but I can't, it just ends with a black screen that says safe mode in all four corners. And I tried to go to my last configuration that worked, and it lets me get in after like 15 minutes but it won't open programs or delete anything as it says I don't have sufficient resources.
So I don't really know what to do, I had a working computer this morning and now it won't do anything! Another error I kept seeing earlier was 0xc0000142, though that knows nothing to me. I'm scared now that I'm going to have to get my computer reformatted and lose everything on it, so any advice you can give me would be great! I need it step by step because I don't know much about computer configurations or anything like that... thank you so much for your time