thx v much for the rapid answer . about security the matter :
i ve been using ms defender for years & it was perfect since i bought win 10 pro.
i think in june 2023 or around when i made an update using windows update , my app & browser control went down, it happened several times automatically after switching it on.. then i performed a clean install of win 10 pro using my usb ( usb , installable media made directly from ms website site )
it also wont help , i tried to fix by resetting win security, made sfc & dsim scans.. even i performed 15 to 20 clean installs by creating new installable media on a new usb , used hell of anti virus facilities ( premium versions of kaspersky , avast one , avast premium , malware bytes etc ) but i did not help. then i bought a new pc to fix any rootkit in bios , enable any possible hardware security including TPM , but the problem was still there.
then i bought a security solution which hold the win security v well and admin account did not get this kind of prb, but when i attempted to operate the user account the prb was still there, i just switched on the win security on once and it was fixed for ever. it's ok since many months but i want to get rid out of this additional security software as it has a great load on my pc.
one more thing.. after performing a clean i performed sfc scan , and it found and fixed many corrupted files.. it happens many times.. even i created installable media on a new usb from the genuine ms site.. as per my months experience i ve come to know that there is something wrong with the files on ms site or the installable media is not properly created , but i used the same method to create as b4 and there was no prb at all ever for many years..
i ve many thread on ms forum, but no fix.. can you help me to get rid out of this situation ???