Excess use of laptop
I've had my Acer lappy as a desktop replacement for about 2 years now and it's starting to really get laggy. The thing is, it's on almost constantly, everyday for at least 6-8 hours. I keep it plugged in, which is a bad thing, but the battery life was never that long to begin with. Startup is slow, opening programs/browsers takes forever, the administrative warnings can take up to 5 minutes to pop up, and FPS in my games have dropped by about 30%.
Windows Vista SP2
AMD Athlon X2 Dual-Core QL-64 2.1ghz
220 GB HD
4 GB RAM
I regularly run Defraggler and CCleaner as well, which makes this all the more frustrating. I feel the computer deteriorating significantly the more I use it and since I'm a student, I need a decent comp. Help?