I am working on my sister's P400 that was running Windows 8.1 64bit and has 8 gb ram. She wanted me to upgrade it to Win 10. Before I did the move I cleaned it up and ran scans like Malwarebytes and all seemed clean but VERY, Very slow. It took 2 days of working to even get it to boot and then 2 days of task manager . I tuned off most startup programs etc. but it was still slow. I finally made progress and wanted to boot a cd of tools to do a memtest but it never would boot to a cd. I then put in a usb flash drive and it stated the the current security settings was blocking it. Never could make progress on the upgrade so I elected to do the One key rescue recovery. It took 26 hours to complete and it still would not boot. The boot manager comes up with only 2 boot setups (ip4 and ip6) netwok boot. At one time I was able to get into bios and the cd was not listed as a boot device. I am now wondering what I can do. I was able to do a chkdsk on the drive and it showed no errors.
Thanks in advance for any help.