What is it?

Sandboxer - MxjQzL.exe

What does it do?

MxjQzL.exe is a spawn of Sandboxer - a game website which packs a little surprise with their downloads, that being a nasty spyware/adware. It uses random file names that it changes dynamically in set periods. It also uses random text for registry entries, which it also changes. It will also respawn once damaged or deleted. It sets its file attributes to "system" and "hidden" to make detection and removal harder. On top of all this, it is designed to download more adware and spyware. The alternative names include Adware-MemWatcher, Backdoor.VB.nb, Backdoor.VB.oq, Peper Trojan and Peper.trojan.

The following are filenames typical with an infected PC:

upgradememorywatcher.exe
regrepair.exe
idjqqk.exe
bvu9v35.exe
gnsdk.exe
lbk7.exe
mxjqzl.exe
ocn67i0.exe
ojz1.exe
pusy6.exe
pwbm74i.exe
tgjog.exe
tpws.exe
unj36t.exe
xjpvq9t0.exe
yfk8.exe
yubxk.exe
zpuwldj.exe
ymcjqxfa.exe

Removal Procedure

You will find a good removal guide and more details at the CA.com?Spyware Information Center.