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.SIS Support Guide
How To Open SIS Files
Causes of .SIS File Errors
Registry errors are often the leading cause of SIS file issues. It is highly recommended that you scan your PC using the SIS File Repair Tool. This will perform a full system analysis and fix the problematic registry entries causing this issue.
Common Symptoms
SIS file error symptoms can include the inability to open SIS files, program lock-ups, crashes, slow PC performance, startup and shut down problems, and installation errors.
Fixing the Problem
To ensure SIS files can be opened and read by your computer, download and run the SIS File Repair Tool. Simply click the button below to download the software.
Download SIS File Repair Tool Download SIS File Repair Tool  (4.1 MB)
*File size: 4.1MB, Download time: <1min (Cable/DSL)
How To Open SIS Files
File:   .SIS
Instructions
STEP 1:
Download & run RegClean Pro.

STEP 2:
Click 'Scan' to search for errors.

STEP 3:
Click 'Fix All' and you're done!

Fix Your Computer Now

Designed for Windows 8, 7, Vista & XP
  7 Comments on "How to Open .SIS Files"

Flyguy says: Topic: Support
Thanks, it worked!

termin8 says: Topic: Support
amazing, a SIS file fix that works

JILLIAN says: Topic: Support
wow! the scan picked up lots of errors

DaBossman says: Topic: Support
Dude, you don't know how many things I tried to fix this until I found this.

Cat_Lover says: Topic: Support
I'm so happy. My computer works GREAT now!\!!

AstrosFan says: Topic: Support
I'm so happy. My computer works GREAT now!\!!

Rustang says: Topic: Support
now I don't need to buy a new computer LOL

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