Using modern platelet aggregometers, it is possible to evaluate platelet secretion simultaneously, by measuring release of ATP by the aggregating platelets. Measurement of platelet secretion allows the laboratory diagnosis of secretion defects with greater sensitivity than platelet aggregation testing alone.
Windows XP has long been an OS Microsoft begrudgingly kept alive far longer than it could have ever imagined. Initially released in 2001, official support for Windows XP persisted all the way through April 2014. At the time, Microsoft noted that after 13 years of support, it was time for the company to look forward, unencumbered by outdated software.
You can tell when Windows XP was originally installed, but this will do nothing for you if your computer was installed from an image at a factory such as Dell or HP because the image was created well before your computer. Alternatively, most manufacturers put a serial number on the computer.ook at the amount of memory, it will give you an idea of how old it is. If you got the PC with Windows XP on it, it is probably at least 3-4 years old.