Hello lawrenz15 , Welcome to the forum.
This is what I suggest you do.
Download
CWShredder from my signature below. Unzip it on the desktop.
Open CWShredder and with
ALL other windows closed,
click fix.
Go here and run at least one of the online scans, allow them to delete whatever they find:
TrendMicro HouseCall
eTrust AntiVirus Web Scanner
Panda ActiveScan
Note any thing that can't be fixed
Reboot when done.
Next:
Even if you've already run these, make SURE they're up-to-date and run per instructions.
Make sure you have the
up-to-date versions of
Spybot V 1.3 and
Ad-aware SE Build 1.05 . All are free and available below.
Download Spybot, install and update. Then download Ad-aware, install, and update.
Spybot:
Install the program and launch it.
Go to Start > Programs >Spybot > Search & Destroy and choose Spybot S&D
Close
ALL windows except Spybot S&D
Click the button to
"Search for Updates" and download and install the Updates.
Next click the button
"Check for Problems"
When Spybot is complete, it will be showing "RED" (RED) entries "BLACK" entries and "GREEN" (GREEN) entries in the window
Put a check mark beside the RED
(RED) entries ONLY.
Choose "Fix Selected Problems" and allow Spybot to fix the RED (RED) entries.
Ad-Aware FULL SCAN:
Install the program and launch it.
First in the main window look in the bottom right corner and click on Check for
updates now then click Connect and download the latest reference files.
From main window :Click Start then under Select a scan Mode check
Perform full system scan.
Next
deselect Search for negligible risk entries.
Now to scan just click the Next button.
When the scan is finished
mark everything for removal and get rid of it.(Right-click the window and choose select all from the drop down menu and click Next)
Empty Recycle Bin
Reboot and see if you can download HijackThis now.
Scan with HJT and "copy/paste" a new log file into this thread.
Also please describe how your computer behaves at the moment.