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windows 7 ultimate: lag issues
A couple days ago, my computer started getting laggy when I use windows 7. The funny thing is, it only lags after a period of time after the windows starts (don't know exactly how long or if it's even consistent). It doesn't matter how many programs I was running at the time (well, it do lag a bit more when I open multiply programs) and this certainly isn't the hardware's fault (since it only happen lately while I have been using windows 7 for quite some time).
Any idea on how to fix this?
Oh yeah, my younger brother said around that time period (he didn't remember exactly when), he deleted a few folders and some of them contain dll files, don't know if that is related.