Multiple errors when normally browsing - jpg, ssl, etc

jesh4622

Distinguished
Jun 17, 2011
8
0
18,510
Last night I started having problems using the internet on this computer. YouTube will stop playing on any page. (I have a 30/5mbit connection) Pages that require SSL will give an error in Opera or will just display completely blank in Firefox. Downloads do not complete or are corrupted when they finish ten minutes later for small files. I tried to download Firefox six different times to see if it was Opera before I gave up and used a USB drive to get it from my laptop. Also, most interestingly, JPG images become corrupted. There are some screenshots down lower. Super annoying.

In addition:

-speedtest.net comes back at appropriate speed
-SSL test comes back passed every time
-SSL not disabled in either browser
-Pages that have a load process like Gmail never finish
-Uploads fail - like the images here took multiple tries before I gave up and used the laptop
-My PC is hardwired into the router, but the laptop and all smart phones can use the internet wireless and flawlessly

I keep Avast up to date. Results come back clean after a scan. Opera was kept up to date, and since I just downloaded Firefox, it's up to date too. I use the windows firewall but windows defender is disabled. Browsers are on the exception list here. All drivers are up to date. There has been no recent driver installs or new programs downloaded. I also know what type of sites will get me spyware or malware. I avoid those, in addition to plugins on my browsers to help with internet garbage. (Ghostery, No Script, HTTPS everywhere, etc)
I am the only user of this PC. Please, pretty please, help, my internet image addiction is suffering! ='(

Screenshots:
http://imgur.com/EAEsR93,pTQb4ty,wmQKrNs,8gW7uzh,XD1qXKS,pUQY673

System Specs:
win 8.1 x64 (2 mo old install)
fx 8350
asrock 990fx killer
4x2gb mushkin 2100
geforce gtx 780 6gb
1tb samsung spinpoint
6x arctic cooling f9 PWM fans
xigmatek midgard ii case
full custom water loop
no oc because: seasonic m12ii 520w
 

jesh4622

Distinguished
Jun 17, 2011
8
0
18,510
ec.rr.com

UPDATE
I downloaded Spybot Search and Destroy on the laptop and ran it on this PC. All it turned up were tracking cookies. I got a suggestion on another forum to try disabling security software. Worked like a charm. This is the second time that Avast has caused problems with my internet usage, although last time the symptoms were different. All better now!