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CAD tip CAD tip # 3425:

Question CAD 
 %  platform  category 
Q - question

Is it neccessary to re-authorize AutoCAD after uninstall/reinstall?
A - answer No. Local licenses (C-Dilla or SafeCast) "survive" program reinstallations without losing their authorization.

You can also safely (not losing your license auth.) update (flash) computer BIOS, change LAN cards, add disks, connect and disconnect peripheral devices (parallel, serial, USB...) change daylight savings or perform small changes of PC system time (with time-limited licenses - e.g. Trial versions).
ACADMDTADTInventorMap
100% *  CAD 
20.11.2003    56984×   FAQ  
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applies to: AutoCAD · MDT · AutoCAD Architecture · Inventor · AutoCAD Map 3D ·

See also:
Tip 10682:Automatic classification of drawing objects by their properties.
Tip 9661:Where to find the Portable license utility (PLU) in AutoCAD 2010, 2012, 2014 and higher?
Tip 9514:Automatically set the Author property in DWG files.
Tip 7203:An automatic legal disclaimer for eTransmit.
Tip 7169:PreSave reactor - automatic operations on drawing save.
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