Scorps65: Below is are the running programs and services. The problem admittedly reared a few months ago. Avast, WScheduler and PhoneTray were staples long before that. Firefox may have been installed about that same time but I would be dubious.
A Google search did turn up reports of the possibly one pixel wide dotted vertical cursor but none ever resolved. I do doubt if my experience is unique.
Ed
Image Name PID Session Name/# Mem Usage
========================= ======== =============== ===========
System Idle Process 0 Services 0 24 K
System 4 Services 0 7,316 K
smss.exe 312 Services 0 1,288 K
csrss.exe 404 Services 0 5,376 K
wininit.exe 468 Services 0 5,392 K
csrss.exe 488 Console 1 28,096 K
services.exe 524 Services 0 10,756 K
lsass.exe 540 Services 0 13,468 K
lsm.exe 548 Services 0 5,316 K
winlogon.exe 664 Console 1 8,820 K
svchost.exe 728 Services 0 10,352 K
AvastSvc.exe 1280 Services 0 14,064 K Avast AntiVirus
spoolsv.exe 1608 Services 0 22,040 K
IntuitUpdateService.exe 416 Services 0 7,676 K
wmpnetwk.exe 1712 Services 0 13,344 K
SearchIndexer.exe 2364 Services 0 22,360 K
taskhost.exe 1884 Console 1 11,124 K
dwm.exe 2780 Console 1 87,440 K
explorer.exe 704 Console 1 71,472 K
AvastUI.exe 2108 Console 1 11,356 K Avast AntiVirus
jusched.exe 2448 Console 1 4,796 K
WScheduler.exe 756 Console 1 6,928 K Event scheduler
svchost.exe 2740 Services 0 17,220 K
PhoneTray.exe 3388 Console 1 13,748 K Caller ID Display
explorer.exe 3392 Console 1 32,692 K
explorer.exe 3468 Console 1 34,556 K
svchost.exe 3920 Services 0 7,304 K
notepad.exe 3960 Console 1 6,908 K
firefox.exe 3748 Console 1 123,124 K Firefox
cmd.exe 3236 Console 1 3,608 K
conhost.exe 3936 Console 1 6,428 K
tasklist.exe 3796 Console 1 6,412 K
WmiPrvSE.exe 5060 Services 0 7,076 K