Navneet singh said:
Hello,i have assemble PC with P4 processor it's speed is 3.01GHz with 512mb RAM AND 80 GB hard disk.Before few month i buy new 500 GB hard disk AND 512 MB RAM to increase the storage capacity after that i'm facing the problem of slow speed of computer.
Run your AV scan. you may be infected.
Also, these days even 1GB RAM should be increased. Load it up with MAX RAM.