That sounds like a general problem with the setup of the machine. The link called Stability in our wiki would be the best place to start.
You still haven't said which version you are using. 17.0.173 is available at the top of this board.
17.0.0151
Media Center
Install Path: C:\Program Files (x86)\J River\Media Center 17\
Interface Plugins: TiVo Server (not running)
JRMark: never run
Library: 37468 files, 6.1 MB in library, 64.2 MB in thumbnails
Resources: 45.2 MB memory, 522 handles
Version: 17.0.151.0 Registered
Batteries
Microsoft AC Adapter (driver 6.1.7600.16385)
Microsoft ACPI-Compliant Control Method Battery (driver 6.1.7600.16385)
Microsoft Composite Battery (driver 6.1.7600.16385)
Bluetooth Radios
Intel(R) Centrino(R) Wireless Bluetooth(R) 3.0 + High Speed Adapter (driver 1.0.90.20620)
Computer
ACPI x64-based PC (driver 6.1.7600.16385)
Disk drives
WDC WD7500BPKT-75PK4T0 ATA Device (driver 6.1.7600.16385)
Display adapters
Intel(R) HD Graphics Family (driver 8.15.10.2253)
NVIDIA GeForce GT 525M (driver 8.17.12.9610)
DVD/CD-ROM drives
HL-DT-ST DVD+-RW GS30N ATA Device (driver 6.1.7601.17514)
MagicISO Virtual DVD-ROM0000 (driver 6.1.7601.17514)
Human Interface Devices
HID-compliant consumer control device (driver 6.1.7600.16385)
HID-compliant device (driver 6.1.7601.17514)
HID-compliant device (driver 6.1.7601.17514)
HID-compliant device (driver 6.1.7601.17514)
USB Input Device (driver 6.1.7601.17514)
USB Input Device (driver 6.1.7601.17514)
IDE ATA/ATAPI controllers
ATA Channel 0 (driver 6.1.7601.17514)
ATA Channel 1 (driver 6.1.7601.17514)
ATA Channel 4 (driver 6.1.7601.17514)
Intel(R) 6 Series/C200 Series Chipset Family 6 Port SATA AHCI Controller - 1C03 (driver 9.2.0.1011)
Imaging devices
HP CLJ CM2320 Scan (driver 3.0.0.1)
HP CLJ CM2320 Scan (driver 3.0.0.1)
HP CLJ CM2320 Scan (driver 3.0.0.1)
HP CLJ CM2320 Scan (driver 3.0.0.1)
HP CLJ CM2320 Scan (driver 3.0.0.1)
Integrated Webcam (driver 6.1.7601.17514)
WSD Scan Device (driver 6.1.7600.16385)
Intel® Centrino® Wireless Bluetooth® 3.0 + High Speed Devices
Intel® Centrino® Wireless Bluetooth® 3.0 + High Speed Virtual Adapter (driver 14.3.0.4)
Keyboards
HID Keyboard Device (driver 6.1.7601.17514)
Standard PS/2 Keyboard (driver 6.1.7601.17514)
Memory
Free Physical Memory: 3.6 GB
Total Memory: 7.9 GB
Mice and other pointing devices
HID-compliant mouse (driver 6.1.7600.16385)
PS/2 Compatible Mouse (driver 6.1.7600.16385)
Monitors
Generic PnP Monitor (driver 6.1.7600.16385)
Network adapters
Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20) (driver 1.0.0.37)
Intel(R) Centrino(R) Advanced-N 6230 (driver 14.3.0.6)
Microsoft Virtual WiFi Miniport Adapter #2 (driver 6.1.7600.16385)
Microsoft Virtual WiFi Miniport Adapter (driver 6.1.7600.16385)
Operating System
Microsoft Windows 7 64-bit
Processors
Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (driver 6.1.7600.16385)
Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (driver 6.1.7600.16385)
Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (driver 6.1.7600.16385)
Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (driver 6.1.7600.16385)
Sound, video and game controllers
Intel(R) Display Audio (driver 6.14.0.3074)
Realtek High Definition Audio (driver 6.0.1.6318)
Storage controllers
MagicISO SCSI Host Controller (driver 2.7.106.0)
Storage volume shadow copies
Generic volume shadow copy (driver 6.1.7600.16385)
Generic volume shadow copy (driver 6.1.7600.16385)
System devices
2nd generation Intel® Core™ processor family DRAM Controller - 0104 (driver 9.2.0.1011)
2nd generation Intel® Core™ processor family PCI Express Controller - 0101 (driver 9.2.0.1011)
ACPI Fixed Feature Button (driver 6.1.7601.17514)
ACPI Lid (driver 6.1.7601.17514)
ACPI Power Button (driver 6.1.7601.17514)
ACPI Sleep Button (driver 6.1.7601.17514)
ACPI Thermal Zone (driver 6.1.7601.17514)
ACPI Thermal Zone (driver 6.1.7601.17514)
Composite Bus Enumerator (driver 6.1.7601.17514)
Direct memory access controller (driver 6.1.7601.17514)
File as Volume Driver (driver 6.1.7600.16385)
High Definition Audio Controller (driver 6.1.7601.17514)
High precision event timer (driver 6.1.7601.17514)
Intel(R) 6 Series/C200 Series Chipset Family PCI Express Root Port 1 - 1C10 (driver 9.2.0.1015)
Intel(R) 6 Series/C200 Series Chipset Family PCI Express Root Port 2 - 1C12 (driver 9.2.0.1015)
Intel(R) 6 Series/C200 Series Chipset Family PCI Express Root Port 4 - 1C16 (driver 9.2.0.1015)
Intel(R) 6 Series/C200 Series Chipset Family PCI Express Root Port 5 - 1C18 (driver 9.2.0.1015)
Intel(R) 6 Series/C200 Series Chipset Family PCI Express Root Port 6 - 1C1A (driver 9.2.0.1015)
Intel(R) 6 Series/C200 Series Chipset Family SMBus Controller - 1C22 (driver 9.2.0.1011)
Intel(R) HM67 Express Chipset Family LPC Interface Controller - 1C4B (driver 9.2.0.1015)
Intel(R) Management Engine Interface (driver 7.0.0.1144)
IPBusEnum Root Enumerator (driver 6.1.7601.17514)
MG5300 series _8AFE3E000000 (driver 6.1.7601.17514)
Microsoft ACPI-Compliant Embedded Controller (driver 6.1.7601.17514)
Microsoft ACPI-Compliant System (driver 6.1.7601.17514)
Microsoft System Management BIOS Driver (driver 6.1.7601.17514)
Microsoft Virtual Drive Enumerator Driver (driver 6.1.7601.17514)
Microsoft Windows Management Interface for ACPI (driver 6.1.7601.17514)
Motherboard resources (driver 6.1.7601.17514)
Motherboard resources (driver 6.1.7601.17514)
Motherboard resources (driver 6.1.7601.17514)
Motherboard resources (driver 6.1.7601.17514)
Numeric data processor (driver 6.1.7601.17514)
PCI bus (driver 6.1.7601.17514)
Plug and Play Software Device Enumerator (driver 6.1.7601.17514)
Programmable interrupt controller (driver 6.1.7601.17514)
System CMOS/real time clock (driver 6.1.7601.17514)
System timer (driver 6.1.7601.17514)
Terminal Server Keyboard Driver (driver 6.1.7601.17514)
Terminal Server Mouse Driver (driver 6.1.7601.17514)
UMBus Enumerator (driver 6.1.7601.17514)
UMBus Root Bus Enumerator (driver 6.1.7601.17514)
Volume Manager (driver 6.1.7601.17514)
Universal Serial Bus controllers
Generic USB Hub (driver 6.1.7601.17586)
Generic USB Hub (driver 6.1.7601.17586)
Intel(R) 6 Series/C200 Series Chipset Family USB Enhanced Host Controller - 1C2D (driver 9.2.0.1013)
Intel(R) 6 Series/C200 Series Chipset Family USB Enhanced Host Controller - 1C26 (driver 9.2.0.1013)
Renesas Electronics USB 3.0 Host Controller (driver 2.1.27.0)
Renesas Electronics USB 3.0 Root Hub (driver 2.1.27.0)
USB Composite Device (driver 6.1.7601.17586)
USB Composite Device (driver 6.1.7601.17586)
USB Root Hub (driver 6.1.7601.17586)
USB Root Hub (driver 6.1.7601.17586)
WSD Print Provider
WSD Print Device (driver 6.1.7600.16385)