Note that many websites have their own advertising, unrelated to adware.
Adware is any software application in which advertising is displayed while the program is running. The authors of these applications include additional code that delivers the ads, which can be viewed through pop-up windows or through a bar that appears on a computer screen and sometimes through text links or in integrated search results. Adware may or may not track personal information. It may also gather information anonymously or in aggregate only. Users should check the EULA and Privacy policy to ensure if the adware on their machines conforms to their standards.
Official
Description:
An invasive Hijacker that copies multiple files and morphing startup entries on every boot to avoid detection and removal.
Symptoms include:
pqnelhleyy ac1f108b 65109820
About:Blank as your homepage
Excessive pop-ups (normally porn related)
Randomly generated files names
Comment:
This is quite possibly one of the most difficult kind of infections. Many times in order to get a computer completely rid of this pest, a professional spyware researcher must be consulted.