>-Is there a way to restrict users from changing the system date on Windows 95?
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Yes, you can restrict access to the control panel applet using POLEDIT to maintain system profiles on a user by user basis.

>-Is it a good idea to use win95 instead of NT on workstations at all?
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It depends entirely on hardware and software mixes. if security is a mjor issue, the NT is clearly preferable. if you have a need to access legacy DOS apps or WinApps that require low-level access to hardware, it's more likely to work under Win9x than WinNT.

>-Can I restrict it in NT.
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Yes, through the same mechanisms; it's actually easier to do in NT, which has a wider set of controls over user accesses and permissions on the local workstation, and it's much harder to bypass the security under NT.

>-How about a third party product, I remember seeing some programs that restricted acces to the Control Panel in some display PC's at stores, still, people could insert a package in WordPad and run a DOS prompt.
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>I've had users changing the system date, making my app do funky things, they usually don't do it with bad intentions, but they could.
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>I have a bunch of other security concerns because in this particular system the file server is a win98 machine, anyone can see the app's folder, and could just delete the system if they felt like it!!!!!.
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You probably want to run an NT domain, and use user-level rather than share-level security that's administered through the domain.

>Is it possible to hide a given folder while making it accessible to an application, that is not client-server?. I thought of giving the folder in which the app is, a share name like NOONEWILLTHINKOFTHIS$, so it's invisible unless you now the share name, and have my app now this name and access it's data thtough it, what do you all think?, TIA
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It's a pretty lame scheme, thatr relies on users being too stupid to find it, which in my experience is not a reasonable assumption. NT can provide better security if administered properly.