File extensions that can contain malicious codes that can harm your PC. (Virus, malware, adware, spyware, etc.)

1. .ade ----- Microsoft Access Project extension
2. .adp ----- Microsoft project
3. .asx ----- Windows Media Audio/Video
4. .bas ----- Visual Basic class module
5. .bat ----- Batch file
6. .chm ----- HTML Help file
7. .cmd ----- NT Command Script
8. .com ----- MS DOS Program
9. .cpl ----- Control Panel extension
10. .crt ----- Security Certificafe
11. .exe ----- Program
12. .hlp ----- Help file
13. .hta ----- HTML program
14. .inf ----- Setup Information
15. .ins -----Internet Naming Service
16. .isp ----- Internet Communication settings
17. .js ----- Jscript file
18. .jse ----- Jscript encoded script file
19. .lnk ----- Shortcut
20. .mda ----- MS Access add-in program
21. .mdb ----- Ms Access program
22. .mde ----- MS Access MDE database
23. .mdt ----- MS Access workgroup information
24. .mdw ----- MS Access workgroup information
25. .mdz ----- MS Access wizard program
26. .msc ----- MS Common Console document
27. .msi ----- MS Windows Installer package
28. .msp ----- MS Windows Installer patch
29. .mst ----- MS Windows Installer transform or MS Visual test source file
30. .ops ----- Office XP settings
31. .pcd ----- Photocd image, MS Visual compiled sript
32. .prf ----- MS Outlook profile settings
33. .reg ----- Registration entries
34. .scf ----- Windows Explorer command
35. .scr ----- Screencaver
36. .sct ----- Windows Script Component
37. .shb ----- Shell scrap object
38. .shs ----- Shell scrap object
39. .url ----- Internet shortcut
40. .vb ----- VBScript file
41. .vbe ----- VBScript Encoded script file
42. .vbs ----- VBScript file