New build on Win7

I know it's old but I like it - plus I'm a cheap git.

Do I have any options for building a new pc and retaining (64bit) win7 or is it so old keeping it would cause major problems?
Cheers

You can't get cheaper than free for win10 and all the new stuff to build a new computer has drivers etc written for win 10.

The "too old" can be problems with new accessories (because there aren't the drivers for them), or security problems which are no longer addressed.
If you choose to stay on an older version, and be connected to the Internet, Google

win7 known vulnerability

or similar to make a decision about the risk.

I left about WinXP, and switched to Linux, so can't comment on the building issue.

If you know enough to build a good PC, you should be able to answer the question yourself?

First thing I'd do would be to spec out what you think you want to put in your new PC and check how it compares to the cheapend prebuilt boxes available now. $500 or $600 seems to buy you a lot of PC these days.

I'm another who gave up on Windows and moved to Linux.

Win10 is free, true... but almost everything in it requires 'net connectivity. Even solitaire requires the internet. If you have a limited connection, eg. a remote rural area, then W10 is a PITA. (Besides, no commercial product is truly free. If you're not the paying customer you are the product. Data mining, anyone? ;) ) And trying to get rid of Cortana is akin to replacing the early versions of IE. [shudder]

Win7 avoids these issues, but most new motherboard & gfx card drivers aren't available under it. You can probably find older drivers that will do the job, but at the cost of crippling a few of the nicer features of the new HW.

Linux falls somewhere in-between the two; the kernel (core) is up-to-date but sometimes finding drivers can be a headache. Especially when the mfrs only release drivers for Apple or Win and sue anyone who releases other OS drivers for "reverse engineering" their code. Even if they haven't. (NVidia is notorious for this.)

Some of the more cutting edge HW just will not play nice with older OS's, of course. They're often still getting bug-fixes to run correctly under Win10!

So to answer your question: you should be able run W7x64 on a newer PC without major problems, provided you do your homework and buy suitable HW. You will have minor problems, but that's par for course with any home PC build. :D

Good advise, if a PC will work with Win7 or XP, it will run even better using Linux and it's all FREE and no problems with viruses. Take a look at Ubuntu Mate or Linux Mint, they are easy to install and will work on most PC's or laptops:)