I have contacted Acer over the proble to see if they can send out copy boot dvd'S. they advise that this was not possible as my factory reset is loaded onto a hidden partition. I think my problem is there's a virus which has now affected this partition, I have done a factory reset as advised by Acer twice now and I am still getting the same problems.
They have advised me to return it to them for repair as it's still under warranty but that if it turns out to be a software problem then it'll cost me £100, does this sound like a software problem to anyone else!!
I would of rather been able to fix this myself, I have repaired problems in the past that I have posted on here it's just when i google the problem the repair seems to be very technical.
If factory reset has not cured the problem then it sounds like hard drive if you can get to command prompt do a CHKDSK /R
Failing that I'm sure Acer use Hitachi drives download and burn to disc there bootable diagnostic dos software and boot from that to see if it is the drive and it should be able to help if corrupt sector.