In some cases, especially if you have an older PC, you may need to pick up a new RTC card. Even if your hardware is ready, your operating system probably is not. The MacOS, Linux and Unix operating systems are Y2K-compliant, but Microsoft Windows remains somewhat problematic. No version of Windows will fail to operate in 2000, but the date rollover may cause problems with date settings in desktop utilities and application software. Those issues include incorrect dates on files and folders in the Find utility and errors in Microsoft Wallet, the e-commerce interface that ships with Windows 98.
Application software is a mixed bag.
Even on fully compliant operating systems, like the MacOS and Linux, programmers may not have coded date routines to handle post-1999 years. You have to check with the manufacturer of those applications you rely on, especially those that handle accounting and other date-dependent functions. Some versions of Intuit's Quicken personal finance software, for example, are not Y2K-compliant. If you open these older files with compliant applications, they will not likely cause errors. However, doing this search will help you identify applications that you may have missed in your Y2K review and prepare you to, if necessary, export the data to a compliant application.