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Classic System Requirements - OST QB DPC

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These System Requirements are for current release of our Classic product line (On-Screen Takeoff, Quick Bid, Digital Production Control). If you are looking for System Requirements for Oasis Takeoff, see OTK - Oasis Takeoff System Requirements. Previous versions may have had different system requirements - see the user guide appropriate for the version of the software you are using.

The minimum system requirements support basic functionality of these programs. Actual requirements will vary, depending on your system configuration, other applications installed and running on your computer, the complexity of the electronic plans you use, and if you use the programs interactively. See CLS - Improving the Performance of your Products for more information.

Operating System


Windows®  10 Pro or Windows Server 2016


Windows®  10 Home

32 Bit and 64 Bit operating systems are Supported.

You must keep your Windows 10 system updated with all Microsoft' updates to install and continue to use our software.

At this time, ConstructConnect does not test our desktop products in the following environments, but there is no reason they shouldn't work - we just cannot provide technical support for these installations because they are not tested or documented: 
  • Windows 365 (Cloud Windows)
  • Windows virtualized on a MAC
  • Citrix or other virtual desktops/application publishing environments
  • Windows® 7, Windows 8 and 8.1, and Windows Server 2012 (unsupported operating systems)

CPU (Processor)


  • Intel Core i5 or faster


  • Intel compatible 1GHz processor or faster (this likely will not provide acceptable performance)

Memory and Storage


  • 8 GB RAM or more (requires a 64-Bit operating system)
  • 256 GB or larger solid state hard drive (the largest and fastest hard drive you can afford)


  • 4 GB RAM (this likely will not provide acceptable performance)
  • 64 GB Hard drive (this may not be large enough for Windows, other applications, and data files) 

Other Requirements

  • Minimum display resolution: 1280 x 1024
  • Internet connection required, see CLS - Configuring Your Firewall (Classic Products)
  • Classic products must be installed by local Windows administrator (domain Admins may be restricted by security policy), see Related Articles for additional information
  • .net 4.5 or higher required for Oasis products; .net 3.5 required for Classic products

These requirements apply to the Current Release of On Center's Classic products.  For version-specific System Requirements (Classic Products), check your product's Help file.  Basically, if your PC is capable of running a supported version of Windows, it should be able to run On Center's products. If you are looking for System Requirements for Oasis Takeoff or Enterprise License Manager, please see Related articles.

Additional Information

Classic functionality that requires Microsoft Excel or Word works with fully-licensed, locally installed versions of Microsoft's supported software only (web apps do not work with our software).

If you are running a version of Windows older than Windows 10, you must install a specific Windows Update, that includes the Universal C-Runtime update. Click here for instructions on installing this Windows Update. (Please note, only Windows 10 and Windows Server 2016 and newer are supported.)

SQL Server 2012, 2014, and 2017 (full or express versions), see CLS - Using SQL with Classic Products for more information.  If you are using an older version of SQL, you must upgrade SQL before installing any OCS product updates.

Apple Users

There are two environments in which supported products may be installed on an Apple computer running MAC OSX:

  • Bootcamp - this is a separate partition from MAC OSX on which a stand-alone installation of Windows is running. This allows the user to run Windows OR MAC OSX but not both at the same time. Because this is "normal" installation of Windows, this environment is supported.
  • Parallels (or any other virtualization product) - this allows a MAC OSX user to run a virtualized installation of Windows within the MAC OSX environment. This is not a stand-alone installation of Windows, it is sort of running Windows within a window, so to speak. ConstructConnect cannot provide technical support for this installation, although, as stated above, there is no technical reason this would not work. 

See ALL - Using Apple hardware (a MAC) with On Center's Products for more information.

Product documentation (user guides) describes functionality in the latest version of each major release and may not match the functionality in the version you are using. Please check the Product Information and Downloads pages by clicking one of the product buttons above.

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