If you use Megaupload.com then you know that some country have problem downloading from megaupload. Cause there is not enough slot available for that country.Meaguplad says install a megaupload tool bar to get free slots. But You can Bypass This too. Use Firefox Browser.

Download and install And Use This Add on On Firefox. Just Go to tools click on megaupload3 then enable.
Download

It will Fix Free slots from Megaupload for other countries it Works on Megaupload and Sexuploader (Megarotic)

Note:Learn to Backup Registry Before Editing.

On an NTFS partition, Disk Cleanup can compress old files to save space. But calculating the savings and performing the compression often take a long time, and on some systems, Disk Cleanup hangs during the process. If that happens, or if you don’t care to wait,
use this Registry tweak to disable the compression Delete the key

HKEY_ LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches
\Compress Old Files

Browse Secured (Blocked) Sites On your Pc like banks or online stores. i found this very useful.

Open notepad and write following DLL’s.. or just copy-paste these

and save it and rename thefile something like securefix.bat

regsvr32 SOFTPUB.DLL
regsvr32 WINTRUST.DLL
regsvr32 INITPKI.DLL
regsvr32 dssenh.dll
regsvr32 Rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 Cryptdlg.dll

Then just run the file and your problem should be gone