Gradually slows up and become unresponsive

Hi all,

Recently (maybe Windows 10 regime) Windows 5 and 6 BETA start fine, then start to slow up, menus begin to open in slow-motion and then clicking menu options have no effect… finally freezes. Happens with different models, old and new. Any idea? Seems odd if it is a memory allocation problem since huge WORD docs and other graphic stuff work fine. Done all the virus/malware checks I can and shows clean…

Almost impossible to use now…

Thanks