What to do when "Open with" dialog box keeps popping up

 The problem is your system has lost the association between the program and the file to execute it....so to restore it you have to reinstall into the registry.

FILE ASSOCIATION FIX- WINDOWS 7 ONLY

This page contains the file association fixes for some of the common file types. These fixes are applicable for Windows® 7 systems only.

AVI	ICO	REG
BAT	IMG	SCR
BMP	INF	TIF/TIFF
CHM	JPE/JPEG/JPG	TXT
CMD	JS	VBS
COM	LNK	WMA
EXE	MP3	WMV
GIF	MPE/MPEG/MPG	XML
HTM/HTML	MSC	ZIP
Directory	Drive	Folder

Instructions

To fix the association for a particular file type:
1. Download the corresponding fix from the above table. (Use Right-click – Save as option in your browser to download the fixes.)
2. Unzip the file and extract the .REG file to Desktop.
3. Right-click the REG file and choose Merge. Alternately, you can open the Registry Editor and then using the Import option from the File menu, to merge the REG file contents.
Note that you need to be an administrator to apply these fixes.

FILE ASSOCIATION FIXES FOR WINDOWS VISTA ONLY

audiocd	avi	bat	bmp	chm	cmd	com
dvr-ms	exe	gif	htm	html	ico	inf
jpe	jpeg	jpg	js	lnk	mp3	mpe
mpg	msc	mpeg	reg	scr	tif	tiff
txt	vbs	wma	wmv	wsf	xml	xps
zip	Folder	Directory	Drive

Usage instructions

To fix the association for a particular file type, download the corresponding fix from the above links table (Use Right-click - Save as option in your browser to download the fixes). Unzip the fix and extract the .REG file to the Desktop. Right-click the REG file and choose Merge. Note that you need to be an administrator to apply these fixes.

FOR WINDOWS XP here are the file association fixes:


Batch File Association Fix (Restore the default associations for BAT files)
CAB File Association Fix (Restore the default associations for CAB files)
CHM File Association Fix (Restore the default associations for CHM files)
COM File Association Fix (Restore the default associations for COM files) - Thanks to John Hanney
CPL File Association Fix (Restore the default associations for CPL files)
Directory Extension Fix (Restores defaults to HKCR\Directory)
Drive Association Fix (Restores default settings for hard drives)
EML File Association Fix (Restores defaults for EML files)
EXE File Association Fix (Restore default association for EXE files)
Folder Association Fix (Restore default associations for File Folders)
GIF File Association Fix (Restore default associations for GIF Files)
HLP File Association Fix (Restore default associations for HLP files)
HTA File Association Fix (Restore default associations for HTA Files
HTM/HTML Associations (Restore the default associations for htm/html files)
ICO File Association Fix (Restore the default association for ico files)
INF File Association Fix (Restore the default assocation for INF files)
Internet Explorer Desktop Icon Fix (Restore the default behavior for the Desktop IE icon)
JPE/JPG/JPEG Association Fix (Restore the default associations for jpe/jpg/jpeg files)
LNK (Shortcut) File Association Fix (Restores Default Shortcut Behavior)
MPG/MPEG File Association Fix (Restores default associations for MPG/MPEG files)
MSC File Association Fix (Restore default associations for MSC files)
MSI File Association Fix (Restore default associations for MSI files)
MSP File Association Fix (Restore default associations for MSP files)
REG File Association Fix (Restore default associations for REG files)
SCF File Association Fix (Restore default associations for SCF files)
SCR File Association Fix (Restore default associations for SCR files)
TXT File Association Fix (Restore default associations for TXT files)
TIF/TIFF File Association Fix (Restores default associations for TIF/TIFF files)
URL File Association Fix (Restores default associations for URL - Internet shortcuts)
VBS File Association Fix (Restores default associations for VBS files)
ZIP Folder Association Fix (Restores default associations for ZIP Folders - REG File)