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There are 4 missing drivers after installing windows 7 on your acer aspire 7720 laptop. 3 are Base system device and we have not found them, 1 might be ricoh SD card driver. The 4th missing driver is Unknown device and the Correct driver is ENE CIR DRIVER. You can download it here. For windows 10 there 1 missing driver. This is Base system device needs the driver updating in windows device manager. The correct device is Ricoh XD picture card controller. Update drivers in device manager on windows 10.

Don't forget the correct power supply for this laptop is 19v 4.74a 5.5mm x 1.5mm/1.7mm



Windows XP Home 32 bit - Not supported
Windows XP Professional 64 bit - Not supported
Windows XP Professional 32 bit - Not supported
Windows XP Home 64 bit - Not supported

Windows Vista Starter 32 Bit - Not supported
Windows Vista Home Basic 32 Bit - Not supported
Windows Vista Home Premium 32 Bit - Not supported
Windows Vista Business 32 Bit - Not supported
Windows Vista Enterprise 32 Bit - Not supported
Windows Vista Ultimate 32 Bit - Not supported
Windows Vista Home Basic 64 Bit - Not supported
Windows Vista Home Premium 64 Bit - Not supported
Windows Vista Business 64 Bit - Not supported
Windows Vista Enterprise 64 Bit - Not supported
Windows Vista Ultimate 64 Bit - Not supported

Windows 7 Starter 32 Bit - Listed Here
Windows 7 Home Basic 32 Bit - Listed Here
Windows 7 Home Premium 32 Bit - Listed Here
Windows 7 Professional 32 Bit - Listed Here
Windows 7 Enterprise 32 Bit - Listed Here
Windows 7 Ultimate 32 Bit - Listed Here
Windows 7 Home Basic 64 Bit - Not tested try 32 bit
Windows 7 Home Premium 64 Bit - Not tested try 32 bit
Windows 7 Professional 64 Bit - Not tested try 32 bit
Windows 7 Enterprise 64 Bit - Not tested try 32 bit
Windows 7 Ultimate 64 Bit - Not tested try 32 bit

Windows 8 Pro 32 Bit - Not tested
Windows 8.1 Pro 32 Bit - Not tested
Windows 8.1 Pro With Bing 32 Bi - Not tested
Windows 8 Pro 64 Bi - Not tested
Windows 8.1 Pro 64 Bit - Not tested
Windows 8.1 Pro With Bing 64 Bit - Not tested
Windows 8 Home 32 Bit - Not tested
Windows 8.1 Home 32 Bit - Not tested
Windows 8.1 Home With Bing 32 Bit - Not tested
Windows 8 Home 64 Bit - Not tested
Windows 8.1 Home 64 Bit - Not tested
Windows 8.1 Home With Bing 64 Bit - Not tested

Windows 10 Home 32 Bit - Listed Here
Windows 10 Pro 32 Bit - Listed Here
Windows 10 Pro 64 Bit - Listed Here
Windows 10 Home 64 Bit - Listed Here

Windows 11- Not tested yet...