The last time I saw a post were the font would not fit the dialog box was when someone had deleted one of the Windows system fonts.
If you think you may have done that, or just want to check, open an administrative command prompt window and type:
SFC /scannow
followed by enter. This should do a system file check and possibly find the missing font, if that is the problem.
To open an administrative command prompt, type CMD in the Start Menu search box and hit CTRL+Shift Enter.
Operating System Win 7 x64
Computer Type Homebuilt
OS Service Pack 2
DirectX Version 11
CPU Type and Speed i7 3770K
Motherboard Chipset Asus P8Z77-V Pro
System Memory Type 16 GB Kingston
Video Card Type and Speed Nvidia GTX 680 (2)
Computer Monitor LG 27" (3)
Hard Drive Kingston 240 SSD
Optical Drives LG WH12LS30 Blu-
Modem-Router Type Linksys E3000
Network Adapter Intel Gigabit
Anti-virus Software MSE
Computer Skill Level Average Ability
Windows Experience Index 7.7