I have had a recurrent problem with my pc running slow. You may remember an earlier posting from me. I tried to go into safe mode and determine if it is a softwear or hardware problem but I can no longer get into Safemode. I run win 10 on a Acer Aspire. I tried to restore to an earlier date but it will not complete successfully. Here in the Philippines when you buy a new pc you never get an original win 10 disk to use. They sell you a new pc but the win 10 they put on the pc is downloaded from the net I am sure. Saves them money. If I take it back to the store, they will just put another bad copy on it and I will still have problems. However, I do have an original win 8 disc which I can use if you will tell me how to do it. I need to know how to load the win 8 within or outside of my current win 10 os. My system info is: Acer Aspire E 15 laptop UJTCBL4R, os win 10 ver 10.0.16299 build 16299, x64 based pc. I must do this myself as it is just too far to travel to a big city from this Island. Thanks for any help you can offer.