Relax, we got you.
Driver installation for Windows is not straight forward. Plug in your phone, then open device manager. You will see an unrecognized device there. Right click it, select settings. Click 'Update driver', then choose the 'From this computer' option. Select the driver folder you downloaded. This should work. If it doesnt, click on the option 'Chose from list of producers', select 'Android' or simply all devices, search for OPPO and select the appropiate driver (Android ADB interface).
This should install the driver correctly. After that, get ADB and fastboot up and running: http://forum.xda-developers.com/show....php?t=2588979
Install a current recovery via fastboot. Search the forum for how to do this in detail. The quick version is put your phone into fastboot mode, plug into PC, start fastboot and type 'fastboot flash recovery recovery.img'.
Then push a current ROM to your phone via ADB. Again, search the forum on how to do this. Do a full wipe in the recovery and install a new ROM.
Please report back if this worked so others with the same problem can use this in the future.
OPPO Find 7a | ColorOS 2.0 beta with XPosed Framework