Well, I've bought stand-alone Lightroom 6 for as much as 103 GBP, downloaded it, received my serial number by e-mail, installed it and program doesn't work because of some mfc110u.dll. My system is Windows 7 64 bit, but program came as x86. It had to be installed anyway (to program files 32 folder). But it didn't.
For my GBP 103 I've got nothing but trouble.
You could try downloading the installer again from this website:
There is no 32-bit version Lightroom 6. If downloading from the link I gave you doesn't help, you might try using a different browser.