Sounds like problems with disk space / virtual memory. make sure the drive you have the virtual memory on has at least 12% free.
Plus virtual memory Right click MY Computer - select properties - Advanced tab - Performance -
advanced tab - Virtual memory click change, you can put the page file on a different drive (if you have one), click
custom size and set Initial size to one and a half times the amount of memory you have fitted i.e. 512MB memory
= set to 768MB, set maximum to double your memory amount i.e. 512MB memory = 1024MB click ok.
If your hard drive is full and there is not enough room for the pagefile this can slow down, freeze or even cause the
PC to crash (restart).