If you battery is failing your gonna have crappy performance even with the laptop plugged in, I bet you ten to one you battery is shot....at this point though you could have anything going on including infection of malware or virus, you don't have windows defender running do you at the same time as microsoft security essentials.....those would be on the services tab....
mate windows defender is working fine and updated as well,,,, and i do not use battery at all it is removed and kept in a box in my wardrobe
My Computer
- Computer Manufacturer/Model Number
- sony vaio vgn-n38e/w
- OS
- windows 7 ultimate 32 bit
- CPU
- dual core
- Memory
- 1 gb
- Graphics Card(s)
- 256
- Monitor(s) Displays
- 15.4" widescreen
- Hard Drives
- 120 gb