Can't do Panda ActiveScan

I am definitely not the sharpest tool in the box when it comes to computer technical problems so please forgive any pig ignorance I display! I have read the READ & RUN ME FIRST. Malware Removal Guide and have reached the Panda ActiveScan but cannot get it to scan Local Disks. I get a message in the bottom left hand corner of the scan pop-up saying there is an error on the page. Since I spent the whole of yesterday getting this far, I'm extremely frustrated! If anyone can advise, would be very grateful.

 

Thanks for your reply, chaslang, and apologies for delay replying - assume it's down to time zone difference between UK and US. Yes, I did uninstall and update old Java. Or at least I think I did!

 

Sorry, meant to say that all I have on Control Panel Add or Remove Programmes is Java SE Runtime Environment 6.

 

dumb question re installing HijackThis

As I mentioned before, when it comes to tinkering with computer innards, I'm pretty dumb! I'm fairlysure what I've done is ok but your warnings about unzipping and installing HijackThis in the wrong location are pretty scary. I have not followed your instructions for either creating a C:\Program Files\HJT folder or unzipping HijackThis into it simply because following your instructions did not produce the sort of responses your instructions suggest. I do, however, have an unzipped HijackThis.exe in an HJT folder in C:\Program Files! I am aware I must rename it but first things first. Sorry to be a pain!