I have had problems with my vista machine and now have windoes.old and
windows.vista folders.
I want to delete them but do not have permission, how can I delete them.
Back up your data to an external USB backup drive, always a
sensible thing to do, then reformat the drive.
You can't delete the operating system, while it's in use, or format
the operating system drive..
You can, after saving your data, use a boot disk with the format
command on it.
Best is to have 2 drives, one for the operating system, and one
for data. Then, if for any reason, the system won't boot, your
data stands a better chance of being safe.
Won't boot is not uncommon, the dreaded "No system Disk"
message, caused by one of many possible causes, a virus,
setting up a dual boot goes pear shaped, hard drive failure, etc.