Sir,I have been running MTA very well before some mods,the mods went well with the gameplay but at some point I might have ruined gta3 registry because I am new to the modding.It was my first mod.So after i knew I crashed my GTA sa I removed it with Revo uninstaller installed it again,after that I deleted MTA,reinstalled it.Even after this pop-up comes up saying MTA cleint verification failed.I tried once more but this time firstly I removed MTA restarted then deleted SA using default Uninstaller restarted but no luck,it continues to stop me from playing MTA.As for confirmation that I may have mods that affect MTA I downloaded SAMI(San Andreas Mode Installer) I checked for any Mods,It said "you have no mods",So at last I registered here looking for some help from you guys.Hope I play it soon.