Hello,
I'm having the same issue here.
My OS is Windows 11 x64, and updated from Kaspersky Antivirus to K-Plus.
Did the same installation process (k-plus installed and removed kav)
Since then, My browser stucks sometimes when clicking on a link or performing a seach in Google, for example. It happens mostly the first time. If I repeat the same search or click the link, it's faster.