Many users come to Tee Support labs to complain that they have never installed any program or neither download anything on their computer, but they cannot open some programs on the computer and found the computer performance is slower and slower than before. If you use AVG to have a full scan on your computer, it will identify Sysenter Hook as medium threat. However, it cannot be deleted due to it is the part of the operating system. But if you use other antivirus to have a full scan, you may not find threats on your computer but your computer do act weirdly.
