Help: My system has spyware.

So my computer, which is running on Windows Vista Home Premium, has some infection that's affecting my internet browser. Web pages are loading slower and I see random words being hyperlinked that direct me to various websites that sell different services. I ran a full scan using Malwarebytes but it didn't pick up anything. Here's the log:


10/23/2012 1:57:22 AM
mbam-log-2012-10-23 (01-57-22).txt

Scan type: Full scan (C:\|D:\|)
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 571549
Time elapsed: 3 hour(s), 30 minute(s), 27 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)

I don't know what else to do. I would appreciate any help to resolve this issue. Thanks.