So, we can rule out the hardwares, you're up to date
I wouldn't say the same, yet, for viruses : you can have a USB stick infected or other reasons like that which make possible to have the same behaviour on 3 computers.
Two more questions :
- did you try Firefox ? I personnaly won't rely on IE and Chrome is sometime... special.
- what is your search engine ?
Anyway, two things you can do now :
1- Download and install Ccleaner, it's free and safe. If it asks to install Yahoo Search or something similar say NO. First run
Cleaner (first item left panel), click Analyze (bottom left button) wait until it says 100% complete then click Run Cleaner (bottom right button). Secondly, run
Issues (second item left panel) Scan for issues and Fix selected issues. when this is done re-scan for issues & fix up to the point it won't found any issue.
2- Download and install MalwareBytes Anti-Malware, it's free and safe. Don't accept the Free Try and instal the basic feature. Update it. Go to Scan, then Custom scan > Configure scan. In the left panel add Scan for Rootkits to the selected items, and in the right panel select driver C and D (it would be wise to add your USB sticks as well) then clic Scan now. It will take a long time to scan everything but you can still work on your computer. When the scan is done you'll have a panel with a list of items. Check them all and apply for repairs (save the log file as well).
Your computer should be ok then.