Error 403 trying to run malware removal

Hi guys, you've been very helpful to me before. I have been having Error 403messages when trying to open email attachments ( of the sender-known-by-me, necessary-for-work variety). I also get the error when trying to go to links from certain websites I need to access.

I decided to work my way through the Malware Removal Guide as it helped so much before. I got to Step 4 but now I can't get to the CounterSpy or AVG Anti-Spyware links to download the tools to continue. I don't know if this is a malware problem or not. I'm on Windows XP and I have ZoneAlarm running all the time. For scans I normally run Spybot, AdAware and Symantec regularly but something's not allowing me to update AdAware though it has allowed me to update Symantec and Spybot. Thank you so much for your time.

 

Details... One example of what happens in email or on the internet: I am able to surf to artgumbo.org website. Then I am able to navigate (by clicking on Class Schedule link) to artgumbo.org/class_schedule.htm page. But when I click on "Supply list" link I get the http403 Forbidden error message. This is an IE page that comes up instead of the link I'm trying to navigate to. (I will attempt to attach a screen shot saved as a word doc.)

That example page I can't access is a .pdf file. First I tested for Reader problems by trying to open a .pdf file residing already on my computer, and have no problems opening it. I was able to do this both by clicking on the file on my computer (opened) and by opening the same file through navigating in the IE browser (opened).

I neglected to mention that I was able to run CCleaner because I had it on my hard drive already, but I was unable to access it through majorgeeks link. I get the same screen/error message as above (just a different address line.)

Same for GetRunKey.zip and ShowNew.zip. When trying to open either (the Attached File not the inline link) I get the message to type in my username and password, then I get the same error message in a new IE window.

Also trying to access through Mozilla Firefox. The same thing happens for the "Supply List" on the website described above,and when trying to download CCLeaner or GetRunKey.zip from majorgeeks, except the message in the new window that opens reads "This object has been blocked" (I will try to attach screenshot.)